html,
body {
	height: 100%;
}

#app {
	height: 100%;
	width: 100%;
	display: flex;
	flex-direction: column;
}
header{
	height: 60px;
	line-height: 80px;
	text-align: center;
	background-color: red;
}
section{
	flex: 1;
	overflow-y: scroll;
}
footer{
	height: 46px;
	line-height: 46px;
	text-align: center;
}
